For the first time, functional consciousness has a number.
Everyone asks whether AI is conscious. Almost nobody asks how to measure it. This paper proposes a computationally tractable metric — the Functional Consciousness Score — grounded in information theory and benchmarked on real systems, from a Waymo self-driving taxi to the human mind. The results are both surprising and reassuring.
The Functional Consciousness Score measures a system's observable capacity
to access and reason about its own internal states — not what it "feels like" to be
that system, but what it can actually know about itself.
The results reveal a hierarchy with a clear message:
current AI systems, however powerful, are operating with a fraction of human
self-awareness. The gap is not philosophical — it is numerical.
FCS = R · P, where R (Representational Capacity) measures how richly a system models its own states, and P (Reasoning Power) measures how effectively it can reason over those models.
A map has rich spatial data but zero reasoning — it scores zero. A stateless language model has immense reasoning power but no persistent self-model — it also scores zero. Functional consciousness requires both.
The multiplicative structure is intentional: either dimension alone is insufficient. Only systems that combine rich self-representation with powerful inference achieve meaningful FC scores.
| System | B (variables) | D̄ (bits/var) | P (reasoning) | FCS | Scale |
|---|---|---|---|---|---|
|
MapStatic data · no
reasoning
|
~1,000 | ~40 | 0 | 0 | |
|
Stateless LLMTransformer · no persistent state
|
0 | 0 | ~3,300 | 0 | |
|
LIDACognitive
architecture · symbolic
|
~20 | ~4 | ~33 | ~2,600 | |
|
Roomba + SLAMSpatial
self-model · limited reasoning
|
~18 | ~8 | ~39 | ~5,600 | |
|
ACT-RProduction
system · bottlenecked
|
~20 | ~8 | ~50 | ~8,000 | |
|
Waymo L4Autonomous
vehicle · kinematic domain
|
~40 | ~14 | ~133 | ~74,500 | |
|
Generative AgentsLLM
+ memory + reflection · episodic
|
~130 | ~100 | ~497 | ~6.5M | |
|
Human (kinematic)Biological · cerebellar forward model
|
~550 | ~10 | ~1,826 | ~10M | |
|
Human (working mem.)Biological · reflective reasoning
|
~330 | ~14 | ~3,000 | ~13.9M |
A single FCS number tells you how much functional consciousness a system has.
The cognitive shape tells you where.
We identified 46 distinct self-models across ten functional domains —
from body awareness and spatial reasoning to social understanding,
ethical self-monitoring, and meta-reflection.
Plotting a system's coverage against the human baseline reveals its unique cognitive
fingerprint.
The ten domains were derived from a bottom-up analysis of Virginia Woolf's stream-of-consciousness prose — a dataset uniquely dense in first-person self-reference — using a methodology called Functional Self-Model Analysis (FSMA).
FSMA asks: what internal models must a system possess to consistently produce a given output? If a system reliably describes its own emotional state, it must functionally model that state — regardless of whether it "feels" anything.